2010 Maryland Senate election

The 2010 Maryland Senate election were held on November 2, 2010, to elect senators in all 47 districts of the Maryland Senate. Members were elected in single-member constituencies to four-year terms. These elections were held concurrently with various federal and state elections, including for Governor of Maryland.

Closest races
Seats where the margin of victory was under 10%:• # State Senate district 38, 1.38% (gain)

• # State Senate district 29, 2.30%

• # State Senate district 3, 2.35% (gain)

• # State Senate district 29, 2.93%

Republicans

 * 1) District 5: Larry E. Haines retired.
 * 2) District 7: Andy Harris retired to run for Congress in Maryland's 1st congressional district.
 * 3) District 38: J. Lowell Stoltzfus retired.

Democrats

 * 1) District 14: Rona E. Kramer lost renomination to Karen S. Montgomery.
 * 2) District 19: Michael G. Lenett lost renomination to Roger Manno.
 * 3) District 24: Nathaniel Exum lost renomination to Joanne C. Benson.
 * 4) District 46: George W. Della Jr. lost renomination to Bill Ferguson.
 * 5) District 47: David C. Harrington lost renomination to Victor R. Ramirez.

Republicans

 * 1) District 2: Donald F. Munson lost renomination to Christopher B. Shank.

Republicans

 * 1) District 3: Alex Mooney lost to Ronald Young.